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SNC1D
Name: _______________
Date: ________________
Unit 4 - The Study of the Universe
In this unit we will be studying...
1. ...celestial objects such as the Sun, moon, and planets [Chapter 8]
2. ...celestial objects beyond our Solar System [Chapter 9]
3. ...space research & exploration [Chapter 10]
*You are only responsible for the material covered in the sections listed below.*
8.1 - Touring The Night Sky
What is astronomy? _______________________________________________________________
What is a celestial object? __________________________________________________________
What is the universe? _____________________________________________________________
Celestial Object:
Definition:
star
Details:
-Stars are luminous. What does that
mean?
-How large is our Sun compared to
other stars?
planet
-Why can we see planets when they
are non-luminous?
-What is in our solar system?
moon
-What is an orbit?
-The Earth's moon is non-luminous.
Why does it "shine"?
galaxy
-What galaxy is our Solar System
part of?
**Do questions #1-9 on page 308**
8.3 - The Solar System: The Sun and the Planets
Distances in the Solar System are measured in: _______________________________(AU).
-The average distance from the Earth to the Sun is 1 AU (150 million km)
What are the 4 inner planets and why are they called "terrestrial planets"?
_______________________________________________________________________________
_______________________________________________________________________________
What are the 4 outer planets and why are they called "gas giants"?
_______________________________________________________________________________
_______________________________________________________________________________
What is a dwarf planet and why is Pluto considered one?
_______________________________________________________________________________
_______________________________________________________________________________
Smaller celestial
objects:
Characteristics:
asteroids
-How large are they? What shape are they?
-Where are most asteroids found in our Solar System?
meteoroids
-What are they made of & how large are they?
comets
-When they enter Earth's atmosphere, they burn up, creating streaks of light
called "shooting stars" or ________________. If they don't burn up completely
they land on Earth as ________________.
-What are they made of?
-How long are the orbits of short-period comets (such as Halley's Comet)?
-How long are the orbits of long-period comets (such as Hale-Bopp)?
-Why can we see a tail on a comet?
**Do questions #2,3,4,5,6,8,9 on page 316**
8.5 - Motions of Earth, the Moon, and Planets
Model of the
Solar System:
What revolves around what?
Who discovered it & when?
geocentric model
heliocentric model
What causes planets & other celestial objects to orbit/revolve around the Sun, as well as moons
around planets? _____________________________________
The Earth orbits (revolves) around the Sun once every __________ days.
The Earth spins (rotates) around its axis once every __________ hours.
The Moon orbits (revolves) around the Earth once every __________ days.
The Moon spins (rotates) around its axis once every __________ days.
**Do questions #1,2,3,5,7 (p.328)**